<template>
  <div class="upload">
    <div class="demo-upload-list"
         v-for="(item,index) in uploadList"
         :key="index">
      <template v-if="item.status === 'finished'">
        <img :src="item.url" />
        <div class="demo-upload-list-cover">
          <Icon type="ios-eye-outline"
                @click.native="handleView(item.url)"></Icon>
          <Icon type="ios-trash-outline"
                @click.native="handleRemove(item)"></Icon>
        </div>
      </template>
      <template v-else>
        <Progress v-if="item.showProgress"
                  :percent="item.percentage"
                  hide-info></Progress>
      </template>
    </div>
    <Upload v-show="uploadList.length<uploadListLength"
            ref="upload"
            :show-upload-list="false"
            :default-file-list="defaultList"
            :on-success="handleSuccess"
            :format="['jpg','jpeg','png']"
            :max-size="10240"
            :on-format-error="handleFormatError"
            :on-exceeded-size="handleMaxSize"
            :before-upload="handleBeforeUpload"
            :multiple="multiple"
            type="drag"
            :action="fileUploadAction"
            style="display: inline-block;width:98px;">
      <div style="width: 98px;height:98px;line-height: 98px;">
        <Icon type="ios-camera"
              size="20"></Icon>
      </div>
    </Upload>
    <Modal title="View Image"
           v-model="visible">
      <img :src="imgUrl"
           v-if="visible"
           style="width: 100%">
    </Modal>
  </div>
</template>

<script>
  export default {
    name: "upload",
    data () {
      return {
        defaultList: [],
        imgUrl: '',
        visible: false,
        uploadList: [
        ]
      }
    },
    props: ['multiple', 'fileUploadAction', 'uploadListLength', 'imageList'],
    mounted () {
      this.uploadList = this.$refs.upload.fileList;
    },
    methods: {
      setImg (imageUrl) {
        if (!imageUrl || !imageUrl.length) {
          this.defaultList = []
        } else if (Array.isArray(imageUrl)) {
          let tmp = []
          imageUrl.forEach(obj => {
            tmp.push({ url: obj, status: 'finished' })
          })
          this.defaultList = tmp
        } else {
          this.defaultList = [{ url: imageUrl, status: 'finished' }]
        }
        this.uploadList = this.defaultList
      },
      handleView (url) {
        this.imgUrl = url;
        this.visible = true;
      },
      handleRemove (file) {
        const fileList = this.$refs.upload.fileList;
        let index = fileList.indexOf(file)
        this.$refs.upload.fileList.splice(index, 1);
        this.uploadList = this.$refs.upload.fileList;
        if (this.uploadListLength == 1) {
          this.$emit('setUrl', '')
        } else {
          this.$emit('removeUrl', index)
        }
      },
      handleSuccess (res, file) {
        if (res.code === '200') {
          file.url = res.object[0]
          if (!this.uploadList.length) {
            this.uploadList = [{ url: file.url, status: 'finished' }]
          }
          this.$emit('setUrl', file)
          this.$Message.success("上传成功");
        } else {
          this.$Message.error("上传失败");
        }
      },
      handleFormatError (file) {
        this.$Notice.warning({
          title: 'The file format is incorrect',
          desc: 'File format of ' + file.name + ' is incorrect, please select jpg or png.'
        });
      },
      handleMaxSize (file) {
        this.$Notice.warning({
          title: 'Exceeding file size limit',
          desc: 'File  ' + file.name + ' is too large, no more than 10M.'
        });
      },
      handleBeforeUpload () {
        const check = this.uploadList.length < this.uploadListLength;
        if (!check) {
          this.$Notice.warning({
            title: 'Up to five pictures can be uploaded.'
          });
        }
        return check;
      }
    }
  }
</script>

<style scoped lang="scss" type="text/scss" rel="stylesheet/scss">
  .demo-upload-list {
    box-sizing: border-box;
    display: inline-block;
    width: 100px;
    height: 100px;
    text-align: center;
    line-height: 100px;
    border: 1px solid transparent;
    border-radius: 4px;
    overflow: hidden;
    background: #fff;
    position: relative;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
    margin-right: 4px;
  }
  .demo-upload-list img {
    width: 100%;
    height: 100%;
  }
  .demo-upload-list-cover {
    display: none;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.6);
  }
  .demo-upload-list:hover .demo-upload-list-cover {
    display: block;
  }
  .demo-upload-list-cover i {
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    margin: 0 2px;
  }
</style>
